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COLD-ROLLED STAINLESS STEEL SHEET MATERIAL, MANUFACTURING METHOD THEREFOR, AND COLD-ROLLED STEEL SHEET

机译:冷轧不锈钢板材料,其制造方法以及冷轧钢板

摘要

Provided are a material for cold rolled stainless steel sheets having sufficient corrosion resistance, excellent surface quality, excellent formability, and excellent ridging resistance; a method for manufacturing the same; and a cold rolled steel sheet.A material for cold rolled stainless steel sheets according to the present invention contains C: 0.005% to 0.025%, Si: 0.02% to 0.50%, Mn: 0.55% to 1.0%, P: 0.040% or less, S: 0.01% or less, Cr: 15.5% to 18.0%, Ni: 0.01% to 1.0%, Al: 0.001% to 0.10%, and N: 0.005% to 0.025% on a mass basis, the remainder being Fe and inevitable impurities, and has a metallographic structure containing 5% to 20% of a martensite phase in terms of volume fraction, the remainder being a ferrite phase.Furthermore, the proportion of selectively dissolved ferrite phase grain boundaries among ferrite phase grain boundaries exposed on a surface of a steel sheet is 20% or less of the total length of grain boundaries.
机译:提供一种具有足够的耐腐蚀性,优异的表面质量,优异的可成形性和优异的抗起皱性的用于冷轧不锈钢薄板的材料;一种制造方法;和冷轧钢板。根据本发明的用于冷轧不锈钢薄板的材料包含C:0.005%至0.025%,Si:0.02%至0.50%,Mn:0.55%至1.0%,P:0.040%以下,S:0.01%或小于,以质量计,Cr:15.5〜18.0%,Ni:0.01〜1.0%,Al:0.001〜0.10%,N:0.005〜0.025%,其余为Fe和不可避免的杂质,具有按体积分数计,金相组织含有5%至20%的马氏体相,其余为铁素体相。另外,在钢板表面露出的铁素体相晶界中,选择性溶解的铁素体相晶界的比例为晶界总长度的20%以下。

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